Schaumburg, Ill.  Addressing the need for smaller power inductors in DC/DC converter choke coil applications, Taiyo Yuden (U.S.A.), Inc. claims its new CBC3225-4R7MR device is the industry's first wirewound chip inductor with a 1,000 mA (1A) current rating in an EIA standard 1210 case size.

The new 4.7 microfarad (μF) device, in a 3.2 x 2.5 mm footprint, also provides a 70% surface-area reduction compared to 1-A class power inductors with a typical 5 x 5-mm footprint used in space-critical DC/DC converter choke coils for battery-powered portable devices.

The company said the high-current ratings and compact size of the CBC3225 series were the result of a unique structural design that fully optimized the component's performance characteristics by eliminating all space that did not directly contribute to device functionality. For example, the dead-space generated during the winding of the ferrite core was optimized to a nearly cylindrical shape that eliminated the wasted space produced by squared-off rectangular surfaces.

The CBC3225-4R7MR device is the latest addition to the company's high-performance wire-wound chip inductors in 1210 case size. The 13 models in the CBC3225 series offer engineers design flexibility with current ratings from 270 to 1440 mA, and inductance ratings from 1.0 to 100 μH. These devices improve end-device manufacturability by providing non-polarized electrodes that allow mounting in any orientation on the circuit board. Additional models in the CBC3225 series are under development to enable further reduction of the DC/DC converters used in mobile equipment.

Sample pricing is $0.15 each. All models are in mass production (2 million units per month). Delivery is two weeks.